If you’re able, be sure to check out the I/ITSEC conference on training simulations. This is the largest conference that focuses exclusively on simulations and training. The show includes panels and tutorials and is relevant for both purchasers and developers of simulators and simulation technology.
If you can’t make I/ITSEC, there’s also the Serious Games Summit at the Game Developers conferences in San Franciso starting March 9th, 2010.